tc: pedit: Fix layered op parsing

After lookup of the layered op submodule, pedit would pass argv and argc
including the layered op identifier at first position which confused the
submodule parser. Fix this by calling NEXT_ARG() before calling the
parse_peopt() callback.
Signed-off-by: Phil Sutter <phil@nwl.cc>

tc/m_pedit.c

@@ -422,6 +422,7 @@ parse_munge(int *argc_p, char ***argv_p,struct tc_pedit_sel *sel)
 			p = get_pedit_kind(k);
 			if (NULL == p)
 				goto bad_val;
+			NEXT_ARG();
 			res = p->parse_peopt(&argc, &argv, sel,&tkey);
 			if (res < 0) {
 				fprintf(stderr,"bad pedit parsing\n");